I generally say, I have a lot of ADHD symptoms and shamelessness is one of them. What I am ashamed of is generally not so much illness related, it's what I should know better than what to do IN SPITE of my illness.

My favorite line with kids who say "You can't blame me, I have ADHD/Aspbergers, etc", "Kid, I'm a card carrying member of the crazy club, and I can tell you that none of us gets away with that.It's in the charter. Tell it to the hand!"